Means for driving generators from car-axles.



, W. l. THOMSON. MEANS FOR DRIVING GENERATORS FROM GAR AXLES.

APPLICATION FILED 11017.13 1902. 9 5 Patented Max:1 1, 1911.

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i A OHNEY W. 1. THOMSON. MEANS FOR DRIVING GENERATORS FROM CAR AXLES.

APPLICATION FILED NOV. 13, 1902 Patented Mar. 14, 1911.

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WILLIAM HEATING &: LIGHTING COMPANY, A, CORPOBATIDNIOF NEW JERSEY.

To all whom it may concern: n

Be it known that I, WILLIAM-I. THoMsoN, residing at Newark, in the county of Essex and State of New J ersey,have invented certain new and useful Improvements in Means for Driving Generators from Gar-Axles,- of ollowing is a full, clear, and ex My invention relates to means for driving generators from car axles, .that is to say my invention relates articularl to this subject, but I would ave it uh erstood that I intend to include within the terms employed such analogous organisms as within the limitations imposed b the state of the art may 7 be properl inclu ed, my'intention being to give a ful ,clear and exact "description of onemode of carrying. out my invention as required bylaw, leaving the interpretation as to the scope of the invention to be determined by the state of the art. With this ism embo ying my invention;

understanding I will proceed to describe the form of 'my invention shown in the drawings. I

In these drawings-Fi ure I is-. a plan view part1 broken away siowingari organsectional side elevation of the construction shown in Fig. I; Fig. III'isan enlarged sectional-view'of the frictional driving gear or clutch preferably employed" by me; and. Fig. IV is an elevation thereof. In the embodiment of my invention shown in these figures I have 'illustrateda construction adapted for use in situations where the driving 'member is subject to variations in speed of a gradual character, and in this sense the construction is to be differentiated from constructions in w i'ch the .driving force abruptly changes, suc as where a motive power is employed which varies during difierent periods or cycles of a single revo-v lution, such,flfor instance, as would be pro- 5 .duced in the 0 eration of an ordinary gas engine as a dnvingforcea With these exdetail the construction shown.

In the drawings a indicates a. car wheel and b the axle thereof. I

0 indicates the truck frame.

Mounted upon the axle b is a pulley d, or if found desirable-the pulle d may be di-- vided and a pluralit of pu leys employed. The pulle d is belte to a pulley e by a plurality of elts f, g, that is to say preferably I. 'rnomson, or niiwaax, new Jnnsnxinssreivon mamn can 'MEANSIOR nmvnm GENERATORS my elm-Airbus.

, i v Specification of Letters Patentj Mar, 14,1911, Application filed November 12,1902. Serial in; 181,076;

held thereon with pressure by the spring 9*,

supplemental frame a. This supplemental members extending from beneath a truck Fig, II is a" a 8 drives the shaft w of a suitable dynamo w,

. supplemental frame .and the endsill of the -ures it will be observed that a suitable spider planationsI will now proceed to describe in -the pivotal points 7 of the levers 4. The lewhich serve through the medium of censhoes .5 against the inner face of the rim-2, 1 as will be explained. l

v a plurality of belts. I A' suitable belt I tightening device is, or may be, employed, w ich may be described as follows: A bracketh is bolted to the end piece 21 of-the truck frame or otherwise suitably mounted, and has-pivoted thereto'a three arm suportercomprisinga bifurcated arm j carry ng a belt tightening pulley is, an arm I carrylng a weig t m' and an arm 0 connected by pin and slot connection with a thrust rod p having a'thrust collarq, against which a coil spring '1' bears. This belt tightening device bears upon the belt or belts f, g, and is the weight m serving to provide the necessary moment'of inertia.

The pulley c is carried upon a-short shaft 8 carried by suitable brackets vit secured to the endp'ieee-of' the truck frame and toa frame a, as clearly shownin Fig. I of the drawings, comprises a pair-of longitudinal cross-member over the end sill and projectving'beyon'd the sameand having their free ends connected by a cross-member embraced by inclined braces to the end sill. The shaft mounted between the cross-member of the truck, the medium] ofa friction transmission gear or clutch designated gene'rally in I and II by the letter 'A, It may herebe noted that, terms of the nature of outer'are used with reference to a direction'outside of or away-from the truck. Detailed views of this transmission gear are shown in Figs. III and IV. In these fig- 1 ismounted uponthe' end of shaft 8 and is *provided with a rim 2. ,The dynamo shaft 10 has mounted thereon a spider 3 to which are pivoted suitable arms 4." Each of these arms 4 is provided with a curved shoe 5, which shoes 5 bear a ainst the inner face of the rim 2, being hel thereon by the action of suitable springs 6 acting in the rear of vers 4 are each provided with weights 8 trifugal action to release the pressure of the The mode of o eration of the construction, shown is as f0 ows: Under ordinary cirrim 2 by the action. of the springsfi, and mov tion will be transmitted to the dynamo a from the axle 6 through the, beltsf, g,'shaft 8, transmission gear A and shaft a. It is, of

course, well known that trains run at vari able speeds and start and 'stop' at intervals. So long as the train remains below a certain normal speed the parts will remain in their normal positions, but. as soon as the train exceeds a normal speed so as to drive the generator toofast the weights 8 will move outward from the center of rotation against the tension of the springs 6 and.

thereby relieve the pressure of the shoes 5 against the rim 2. In this manner the pressure being relieved as soon as the rotation of the car axle reaches a critical speed, the dy namo will always be driven at a constant rate of speed, the excess speed within certain limits causing the pressure to be relieved sufficiently to allow the generator to bedriven at its predetermined rate of speed, which, of course, will be slower than the speed of rotation of the shaft 8, and consequently the -machine will be frictionally driven. It has beenfou'nd in practice that as long as the speed of the car axle is kept within certain fairly defined limits, the generator will be driven at a constant speed,

thereby dispensing with the necessity of minute regulation of the current output through the medium of other devices.

Certain broad features herein shown and described are shown, described and claimed in my co-pending application Serial No. 285,981 filed November 6, 1905, and accordin ly are not claimed herein.

aving described my invention, what I claim' and desire to secure by Letters Pat cut is:

,1. In apparatus of the class described, in combination with a car truck, a' pair of longitudinal members mounted upon said truck and projecting beyond the end sill thereof, a generator, means mounting said generator upon the rojecting ends of said members, a pair of aterally inclined members extending from the ends of said first members to said truck, and means driving said generator from an axle of said truck.

2. In apparatus of the class described, in combination with a car truck, a pair of longitudinal, members mounted upon said truck and projecting beyond the end sill thereof, a generator, means mounting said generator upon the projecting ends of said members, a pair of inclined members extending from the ends of said first members andv secured adjacent the end sill of the truck, and means adapted to drive said generator from an axle of the truck.

In apparatus of the class described, in

' combination with a car truck, a pair of longitudinal members extending from beneath a cross-member of the truck-frame and thence over the end sill thereof and projecting beyond said end sill, a generator,

means mounting said generator upon the projecting endsof said members, a pair of inclined members extending from the ends of said longitudinalmembers, and secured adjacent the end sill of said truck, and means driving of said truck. v

4'. In apparatus of the class described, in combination, a car truck havinglongitudisaid generator from an axle nal members extending beyond the'end of the truck frame, a cross-bar connecting the ends of said longitudinal members, a generator suspended from said cross-bar, and

belt connecting the shaft of said generator with an axle of the truck. j

6. In apparatus of the class described, in combination, a car truck having longitudinal members extending beyond the end of the truck frame, a cross-bar connecting the ends of said longitudinal members, a generator suspended from said cross-bar, braces extending from said cross-bar to the truck frame, and means adapted to drive said generator from an axle of the truck. v

7. In apparatus of the class described, in combination, a pair of longitudinalmembers extending beyond the truck, .a pair of transverse members extending from one to another of said longitudinal members, a generator mounted upon said transverse members outside thetruck, and means adapted to drive said generator from an axle of the truck.

S. In apparatus of theclass described, in

means adapted to drive said generator from I combination, a pair of longitudinal memof said longitudinal members, a generator having its outer side supported upon said transverse member, means supporting the other side of said generator at a point inside said transverse member and outside of the truck, and means driving said generator from an axle of said truck.

9. In apparatus of the class described, in combination, a pair of Ion itudinal members extending beyond the truc li, a pair of trans verse members extending from one to another of said longitudinal members, a generator mounted upon said transverse members outside the truck, means adapted to drive said generator from an axle of the truck, and a pair of lateraliy'inclined members extending from the ends of saidlon'gL' tudinal members to the truck.

10. In apparatus of the class described, in combination with a car truck, a pair of longitudinal members extending from beneath a cross-member of the truck frame and'over the end sill thereof and thence beyond said endsill, a pair of inclined members extending from the ends of said longitudinal members and secured adjacent the end sill of the truck, a transverse member extending from one to another of said longitudinal members, a generator having its outer side supported upon said transverse member, and having its inner side supported at a point inside said transverse member and outside the truck, and means driving said generator from an axle of the truck. 7

11. In apparatus of the class described, in

a combination, a' pair of longitudinal members extending beyond the truck, a transverse member extending from one to another of said longitudinal members, a generator having its outer side supported upon said transverse member, means supporting the other side of said generator at a point inside said transverse member and outside of the truck, means driving said generator from an axle of said truck, and'a pair of laterally inclined members extending from the ends of said longitudinal members and secured adjacent the end sill of the truck.

12. In an apparatus of the class described,

in combination with a car truck, a pair of longitudinal members mounted u on said truck and projecting beyond the en thereof,

a cross-member connecting the ends 015 said longitudinal members, a generator provided atits opposite sides with projecting portions respectively secured to said cross-member and to the endsill of the truck and means adapted to drive said generator from an axle of the truck.

l3. Inapparatus'of the class described, in

the truck, and means ada ted to drive said i 'atits o posite sides with projecting portions respectively secured to said cross-member to the end sill of. the truck, means adapted to drive said generator from an axle of the truck, and a pair of laterall inclined braces extending from the en s of said longitudinal members and secured "adjacent the end sill of the truck.

WILLIAM I; THOMSON. Witnesses:

F. E. Knssmenn, ELINOR E. AIJLBEE. 

